java.lang.NoSuchMethodError: javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String; at org.apache.tomcat.websocket.server.WsServerContainer.(WsServerContainer.java:150) at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131) at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5292) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)